title: Effects of site substitutions and concentration on upconversion luminescence of Er(3+)-doped perovskite titanate.
abstract: Upconversion photoluminescence (PL) of Er(3+)-doped BaTiO3 (BTO) with perovskite ABO3 structure is studied in terms of Er3+ substitutions for Ba (A-) and Ti (B-site) with different Er3+ doping concentrations. PL quenching with an increase Er3+ doping concentration is investigated based on the structural change and energy transfer of cross-relaxation process in BTO: Er, i.e. (2)H(11/2) + (4)I(15/2) → (4)I(9/2) + (4)I(13/2). Temperature dependence of the PL in BTO: Er is revealed, which is associated with phase transitions of BTO host. The results imply that the emission from substituted Er3+ ions may be used as a structural probe for the ferroelectric titanates.
authors.affiliation: Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jianhua
authors.initials: J
authors.lastname: Hao
authors.forename: Chee Leung
authors.initials: CL
authors.lastname: Mak
authors.forename: Xianhua
authors.initials: X
authors.lastname: Wei
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D004871:Erbium / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D017610:Calcium Compounds; D010087:Oxides; C059910:perovskite; D004871:Erbium; D014025:Titanium